So I had some long tube headers installed today that I'm very pleased with. While I was there I asked the guy about possibly doing a cam in the future and he was pretty adamant that I get a better Intake manifold before I do any other mods. What is your opinions on this and what are my options. The only one I ever really hear of is the FAST intake manifold and I know a guy that had one and he actually lost hp on a fourth gen T/A. I have and auto with one of Jannetty's tunes.

You do not need to get a "better" intake manifold. Those do not produce enough HP to really make a difference. I've seen guys on here with about the same mods I have and they have the Fast Intake and they're HP numbers are no higher than mine with it.

YOu do not need a new intake. Get a cam. Are you sure this guy knows LS3 motors? THe OEM intake and heads acutually flow quite well. If anything get a Vmaxx TB for a little better throttle response. A cam is a must however for more power.

I don't know if there is anybody with 200 miles of me that knows these motors well. The shop I had do it has been here forever and I have no complaints on the work they have done for me. I've heard that the heads do pretty good. That was something I had on my list that doesn't seem as nessacary now. I've heard good and bad about under drive pulley as well any opinions on this.